Controlling device for electric motors.



unirsi) `railsrrr Cerros.

CHARLES A. DREssE'R, or CHICAGO, ILLINoIs,-AssIcNoR To c. A.sDwAnnkorILER ann FRANKLIN w. KOHLER, or CHICAGO, ILLINois.

CQN'IRCLLLNG yDEVICE `son ELECTRIC Morrone.

` Specication of Letters Patent.

Pateatesspl 2i, reos.

Application .filed October 2d', 1903. Serial No. 178,368

T o all whom 'it mar/y concern:

Be it known Avthat l, CHARLES A. Draussen, acitizen ofthe United States,residing at Chicago, in'the county of Cook and State oi Illinois, haveinvented a` certain new and useful Im ovement in a Controlling Devicefor Electric Motors., of which the following 'is' a s ecifieation.

g his' invention relates tol controlling devices for electric motors,and has for its 'object to 'provide anew and improved device of thisdescription.

The accompanying drawings illustrate one construction embodying theInvention.

Figlure 1- is a diagrammatic view illustratf ing t e invention andthecircuit relation oi the parts; Fig. 2 is a. view of the main controllings'olenoid; Fig. `is aside view oi' Fig. 2 withA 'parts' brokenaway; Fig. 4 is a plan view of the push-buttons or switches Fig. 5 is asectiona :view taken on line 5 57 Fig. 4; `6 -is'a sectional view takenon line 6 6, Fig. .4.y fFi 7 is a view/of the magnet E as seenfroma ve.

Like letters refer to like parts throughout the several figures.

= Thek present invention 'l is adapted to be l used for controllingmotors in connection with an drivenmechanism, and is particu 'larly aapted Ito beused With'mo'tors for driving flat bed'and other printingpresses.

There is shown in the drawings an ordinary compound wound motor, but itis ci course evident that any other kind ot motor $5` may be used. g l lA controlling device is provided for the motor comprising a solenoid Bprovided Y with a core having a contact device provided With'brushes B2which engage a series of resistance contacts Baasscciated with the' refsistance B". There lare provided certain other electro magnetic devicessuch a's the solenoids A and -C. A solenoid or magnet E is associatedwith the core B1 of the solenoid B., vand is' rovided with a core El towhich is connecte' anenfraging device E2 yadapted to Ato as by means ofthe notches shown. core f this solenoid is normally moved for 1 in anysuitable mannery en a' e the core g g The Ward b a. spring and whenenergized is moved ack so as to release the core B1 and Controlledby thecor .to open the circuits.

'the circuit is Aopened through J and J1 therewith. One of thesecircuitcontrolling devices consists of the two contacts E4 and which arenormally apart' but which are brought into Contact when the ,core E1 ismoved by the energizing of the magnet. The circuit controlled by thesecontacts is` one of the circuits that pass through the so-`V lenoid A.The other circuit controlling device, associated with the solenoid E,consists of the contacts/E6 and the movable contacts E7." The contactsEl are associated with a non-conducting piece ES which is engaged by thecoreoi solenoid 'A conductor E9 passes along the insulatnig'piece E8 andconnects contacts E7 (see Fig. 3). The circuit controlled by 'theseAcontacts is one of the ein cuitspassing through the solenoid B.

- Associated with the core B1 of solenoid B is a circuit controllingdevice Comprising the brushes H H insulated from the core and adapted to`cooperate with a 'series of contacts. When the core is in its normalpcsition these brushes engage contacts H1 and After the core drops theythen engage the dead contacts H3, and the live contacts H4, H? and H Aswitch H7 is lalso controlled by the` cdre B1 by means of .a-projectionorthe like H8. Around the terminals of this switch is a resistance H9.

The magnet or solenoid A has a core provided with the' switches l, l1,l2 and I", When the core is .drawn up switches l and Il are moved so asto complete the circuits aty this point, while switches l2 and I3 aremoved When the core 'the solenoid is denergized and the core falls thecircuits are opened at l and l1 and closed at l2 and l? insulated fromeach other. This through switches J and J1 .and openedand when the corefalls and closed 'through J2. At the top of solenoid C is as'witohd3around the terminals of which is a resistance J4. T his switch isoperated by the'lifting oi the core oi solenoid C so as to cut theresistance in circuit with said solenoid. The series field coils ci themotor are shown at G1 .and the shunt coils at G9. The device iscontrolled and operated `by a series' ot:

through switch. J2,

solenoid A controls the circuit through the ture through the resistanceB9. l linger is removed from the switch it is opened` switches 1, 2,' 3and 4, located at a distant point from the apparatus, and when thedevice is used with a press there will be a series of these switcheslocated at diilerent points around the press. These switches may be oiany desired style and switches 1, 2 and 4, as herein shown, consist of apush-button (see Fig. 5) returned to its normal position by a spring,and adapted when pressed to engage spring contacts to close the circuit,This arrangement perinitsithe full solenoid current to pass through theswitches.

The switch 3 is illustrated in Fig. 6, and consists of a push-buttonconnected to a pivoted conducting piece K1.. This conducting pieceisprovided at the other end with a push-button K2. Wvhen the push-button Kis pressed the connecting piece K1 engages the contacts K so as tocomplete the circuit between said contacts. `When the switch 3 isoperated the circuit between these contacts is broken. The current isadmitted to the device through the terminals X and Y of the mainswitch.`

When the 'circuits are 'properlyT connected .and the starting switch 1is operated a circuit is completed .through magnet E and its core movedto release the core B1 of solenoid B. 'l The core then drops and bymeans of contacts H4, H5 and HU completes the circuit through solenoid Awhich draws up its core and completes the circuit through the arma? tureof the motor. As core B1 falls it gradually cuts the resistance out ofthe armature circuit. To slow down the motor switch 2 is operated tocomplete the circuit through solenoid B causing it to draw up its core.Before the core is fully drawn up, the switch at the bottom breaks thecircuit through solenoid A and its core drops breaking the motor circuitand short circuiting the motor armature. l

In order to instantly stop the apparatus the emergency7 switch 3 isressed. This opens'the circuit at contacts so as to break the circuitthrough solenoid. A and its core drops opening the armature circuit, andshort circuiting the armature through the resistance B. .This alsocompletes a circuit through solenoid B7 which draws up its` core.

To reverse the motor switch 4 is operated.A

This lrst completes the circuit through solenoid C, which draws up itscore and completes the armature circuit so that such circuit isreversed, the currentpassing to the arma- W'hen the and the motor isstopped. The motor circuit is shown in heavy lines and thefswitchcircuits in light lines. The circuits will be traced as follows whenswitch 1 is operated: trom terminal X through conductor 11, throughIcontacts K, to switch 1, thence by conductor l1 to the magnet E, thencethrough said magnet by conductor. -111 to .conductor G 'reachesitsinitial or maximum up positionits terminal X through conductor 11 tocontacts K, thence by conductor A to contacts H, thence through brushesH to contact H5, thence by conductor A to the switch at the back ofmagnet E, which remains closed as long as switch' 1 is closed, and thenby conductor A to solenoid A, and thence by conductor A to conductor G,and thence toter-- minal Y. The solenoid A is now energized and pulls upits core com leting the circuit through the armature of t ie motor whichis traced as follows: from terminal X by conductor G to switch I, thenceby conductor G to the arma-ture orc/'the motor, thence by con-y ductor Gto contacts B3, thence through `the Contact device on the end of coreBlto the contacts B3 on the right, thence by conductor G to switch Il,thence by conductor G to terminal Y. When the brushes H pass to Lcontact H6 the circuit. through the switch at 90 the back of solenoid Eis cut out of the circuit through solenoid A, which then passes throughresistance A'4 and thence to the solen oid. When this resistance is incircuit the current is sufficient to hohl up the core of A but notsuHicient to pull it up. VVhenthe core of solenoid B` reaches the limitof' its downward movement the motor will be operating at full speedwithout resistance in the armature circuit. y

Then it is desired to gradually stop the motor switch 2 is operated. Thecircuit will then be `traced as follows: from terminal XV throughconductor 1l to conductor 21, thenv through switch 2, and thencebyconductor 21 to solenoid B, then by conductor A to con-A ductor G, andthence Vto terminal. Y.' The solenoid B is then energized and draws upits core gradually cutting resistanceinto the armature circuit. n`Whenthe brushes' H pass from the contacts. H4 and H5 the circuit throughsolenoid-A is broken and its core drops, opening the armature circuitwhich connects to the source of supply,. and closing a short circuitthrough the armature.- v This circuit will' be traced as follows;fromthe armature of the motor by conductor G t'o contacts B?, thenthrough resistance B on the left to switch J2, which is nowvclo'sed asthe core of solenoid C is down, thence bv conductor G3 to switch I2,associated vwith the solenoid A, thence by conductor G to the armature.The motor is now Y instantly stopped. When the core of solenoid Bmovement is stopped by engagement with a suitable stopping part. f

When it is deslred vto instantly stop` thev motor when it is running atfull. speed the emergency switch 3 is operated.l ,1 This breaks 130 llecircuit between, contacts K, thus breekbk ing the eil'cut thosghsolenoid A.; she ools of this solenoid d ops and by means of sjwllchconductors A and, G to terminal Y.

' position the switch 'lll ls ,lifted so to cul cient to holflthe coreof solenoid E upf? the resistance H into the o looe.: lls se slsf/ancereducesthe curent out leaves le sul uoll sufficient to .lift it. ThisereufL-, il; *w ll.

. he noted, is closed through this resistance the'resistelces ooi olefcut in esse the c1 'tor vposition, and it is .fles/essay to alwaysstof all times when the eppemtus is not in opera tlo11,'ancl preventsaccidentel dropping of the core of solenoid E. Vents the motoxffrom.heling: ststed up will?.

rent supply for my reason lsils while the motor is operating and "lsthen. tossed on ll oe. noted. that m such event again; it W1 thesolenolflolf ooe B would he ,down all resistance would he out of six@"t, ssd if the consola, wes turned on il; would poss through the moho?Without ses ,e and n'ure it. lo. this oonstru chien lo come.. '5 fallsunder such conditions amil then fsm-Ile@ on, thecircult 'hsoughsole/sold B is pletedlxa-s soon es she curfew is lrx'meo. on es the cand` the solenoid el, once draws up lss co'aeso as to bring the parts totheir plolec iveposilon; When il, isde ed 'l2-o severse themotol'vthesveh l is ooe/W snno he l el' of solenoid vl5 in fl. The o" 1,ml o? the molo?? 'by hihgog loe to thisp tion hel'ole it is possible 'toz'evefselli.; preveo's the sooo n when mening' the operators o pose ofsuddenly snopp jury. due to this me is om When the col1 'i position e isaced cohductol 1l lao terminal of sW-oh thence through svqigeh 4 tooondue'oln 4.1? stof- 41 to l theses by co?. brushes H, thence conductosesl so swl'ih J3, thence lhlough solenoid C lo oolfidue'o A,' thencetl'lrough conducto? "l to te'mhel Y. The core of solenoid. C s shelldrawn 'op and Completes the armatore ,ceo so l the coment passeszh'ougll' s .15e-.Wyse I recton, thus leversinghhe mo Y. This com cuitwill he traced ss follows: X through colrnlucinol."y lo by conductor Gto thee@ e of solenoid A would theo. he slow y eeloss lo the sommetsosu-fthe of ce by cotld'oetol G to switch J1 reversed sod will con1 lthis dlecoo ss long es the s lzxelc. closed.. Vlhell this switch is .hee-l'cul' 'hough solenoid Cv is enel il l'eps, thos hlealng the cir Houghthe assomme. 'Thselso short is the aasmemuje through the resistances'laeffl with solenoids A 'and (l, constitute what may he felled e,double pole swtchlavng pools ndependen'ly oomolled hy dlferentsolehol'ls, emi this emesgement ,peru-gigs -the eonl'ool the hy a .Lsimple Buf1-.egemonia of the end osfmes she proectiom of theme somscecems sud om ceelessnessof levies fof motors com "slr-snee co'otsctswith ,re-- :Led ,.lfheewtk: a mov lasted to move lherealong, sl

l ,devise having en elec "wel, elee'lo magnetic 'icl-movable device,move said mow ve loto the moto-1' ch s. distant sslcl elee'zro magneticend. means lfhe moto? so e the cuwosl, es lfl gh seme reused. when.

ng lovin o3.' moos 1g sones 'stone-e @comets Wthese cells ossoeelsef'he'eweh, e movflcvee adsplueol to move these/sloeg, an w el ree-ellswitch device in the eceos., means for oontolling sazl v 'oo'l e dissentpoll saisi .moldes swltoh lll.

efore, limit oy conductor G to' terminal' Ya use vof the same ofcontacts and fesistu cuis mole @les ce whesm switches adap'ted'tov makeand break the.

motor circuit yat two different points, a second electricall controlledswitch device having two switc es adapted to cooperate to close themotor 'circuit when the switches of the rst switch device are o en thecontrolling circuits for said electrically controlled switches beingindependentof the position of. said switches. i

y 4'. A controlling device for motors comprising aseries of resistancecontacts with .re-

sistances associated therewith, a contact device adapted to movetherealong, a controlling solenoid for said contact device, twosolenoidseach operating switches associated with `thefmotor circuit, twoswitch dev-ices associated' with said contact device and adapted tocontrol the circuits through both of said solenoids said switchdevicesadapted tobe operate/d by means o said contactdedown positions,

5. A controlling device'for motors comprising a series of resistancecontacts with resistances associatedther'ewith, a contact de- Viceadapted to' move therealong, a controlling solenoid for said contactdevice, an electrically controlled switch for reversing the direction ofthe current through the motor 'amature'and Vmeans for preventing thisreversal .except when the contact device is in its maximumu position.

16. A control pris'ing'a series of resistance contacts with resistancesassociated therewith, a contact de- -vice adapted to move therealong, acontrolling-solenoid for said contactdevice, two elec-` tricallycontrolled switches associated with the armature circuit4v ofv themotor, one

adapted when operated to break both of the connections between the motorarmature and the' source of supply, and the other adapted when operatedto close these connections so that the current through the armature isreversed, and means for controlling ermediate its 'maximum up and gdevice for motors com-4 said device from a distant point the controllingcircuits for the electrically controlled switches being independentofthe position of said switches.

7. A controlling device for motors comprising a series of resistancecontacts with resistances associated therewith, a contact device adaptedto move thcr'ealong so as to cut resistance into or out of the motorcircuit, two circuits leading through said controlling solenoid, oneadapted to be closed at a distant point, and the other normally closedwhen the current is turned on. y

8. A controlling device for motors comprising a series of resistancecontacts with resistances associated therewith, a contact device adaptedto move therealong, a controlling solenoid for controlling said contactdevice, two circuits through said solenoid, one normally open, and theother normally closed, and means at a distant point for closing one ofsaid circuits and for .opening the other circuit. l

9. A controlling device for motors cornprising a series of resistancecontacts with resistances associated therewith, a contact device adapted.to move therealong, an electro magnetic controlling device therefor,two electrically controlled switches adapted to be controlled from .adistant point so as to vary the 'motor circuit through the .saidcontacts and resistances to cause the armature to be rotated in eitherdirection a circuit controllin y device associated with the contactdevice and adapted when in o'ne osition to break the circuit through oneo said electrically controlled switches, and when in' another positionto break the circuit through the other electrically controlled switch.

.'10. A controlling device for motors comprising a series of resistancecontacts with resistances associated therewith, a contact device ada tedto move therealong, a solenoid providedpwitha core to which said contactdevice is' connected, a releasing magnet'associated with said core andadapted to be controlled from a distant point, two electricallycontrolled switches arranged to break bot connections to the armaturecircuit and reverse them, and means for preventing one of saidelectrically controlled switches from being operated when the contactdevice is in its'initial position. d'

' CHARLES A. DRESSER.

Witnesses: i d Homan L. KRAFT, E. K. REYNOLDS.

